With the change to fading memories (Rank 2 isn't until serpent's spine) being now 12% of mana versus the 900 it used to be, its a detriment to have a larger mana pool. On agnarr at least, your limited to the 15 worn flowing thought and any +mana regen aa clickies (Celestial Cloak) as your only source of mana regen. Someone with a smaller mana pool can use fading memories , assuming capped FT, much more often than someone with better gear. Sure, you can argue that you can cast Denon's more, but really, after the change to it's targets how many bards truly cast this, especially in raids, as is highly inefficient as well. Ultimately, just feels as if a mana pool is of little use , at least in end game.